Unverified In-app purchases patching without a separate app?
Is there some (viable) way of patching in-app purchases for an old app that doesn't have (proper) purchase verification (if any at all)? Without Lucky Patcher etc. bc that would require me to always have that installed alongside.
I would also be interested in manually modding the apk. I did look into that a tiny bit a while ago, but I couldn't figure out what I gotta screw around with in the decompiled apk and couldn't really find anything online.
If there's no good way ig I'll go back to Lucky Patcher but I'd really prefer a properly modded apk.
For context/additional info: The payment servers are long offline so there's no other way of accessing the paywalled content anymore. And the app that I'm taking about is LEGO Herofactory Brain Attack